Definitions of “reverse” and “reactivate”

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  • [RESOLVED] Definitions of "reverse" and "reactivate"
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Referring to Course 1.1 on glue and paste.

“PVA is not reversible in general.”
“PVA: Reactivates with Heat”

Can you please explain to me a little more about the characteristics of reversibility and ability to reactivate? How are they related to each other? When would I want (or not want) an adhesive to be reversible and when would I want (or not want) it to be reactivated?

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User Avatar Posted by (Questions: 1, Answers: 0)
Asked on June 24, 2023 3:35 am
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PVA is not reversible because you can't remove it without damaging the object.

PVA reactivates with heat means that if you did not get a good bond when the adhesive was applied, you can apply heat such as with a hair dryer or an iron to get the PVA to flow again and adhere. It may take some pressure as well. For instance, if you use PVA to attach an paste-down and it dried too quickly and didn't adhere evenly, you can iron the end-sheet (through baking parchment) and the PVA will "work" again.

I hope that answers the question. Cheers

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User Avatar Posted by (Questions: 1, Answers: 241)
Answered on June 24, 2023 6:54 am
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